PLS-00580
Error: PLS-00580: supertype must be an object type
Causa: An attempt was made to declare an object type to have a supertype, but the specified supertype was not itself an object type. Object types can inherit only from other object types.
Acción: Remove the supertype specification, or change it to refer to an object type. If the declaration appears correct, make sure the supertype has compiled correctly.
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